Rotary metal-shearing machine.



D. LENNOX. ROTARY METAL SHEARING MACHINE.

- APPLICATION FILED MAR, 26, 1910.

984,575. Patented Feb. 21, 11911.

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COMPANY, 01? MAR FTE.

SHALLTOWN, IOWA.

. "ROTARY METAL-SHEARING MACHINE.

Specification of Letters Patent Patented Feb. 21, 1911.

Application filed March 26, 1910. Serial No. 551,606.

To all whom it may concern:

Be it known that I, DAVID LENNOX, a citizen of the United States, residing at Marshalltown, in the county of Marshall and State of Iowa, have invented certain new and useful Improvements in Rotary Metal-Shearing Machines, of which the fol lowing is a specification.

This invention" relates to certain improvements in details of construction and relative arrangement of parts, upon the metal sheet shearing machine upon which 1 have obtained Letters Patent of the United States No. 951,681, dated April 12, 1910.

The particular improvements which form the subject matter of this application for patent are especially in the manner of mounting the rotating cutters whereby certain cutting or shearing operations are performed with greater facility than with the machine described and illustrated in my aforesaid application for patent.

In the accompanying drawing which forms a part of this application for patent,-I have shown my improved machine in two forms in the following views Figure 1 is a view partly in elevation and partly in section of one form of my improved metal rotary shear, and Fig. 2 is a similar view of a slightly modified form of said machine.

Referring to the details of Fig. 1, the numeral 5 represents generally the frame of my improved machine which is of conventional design for machines of the character to which my invention pertains. 6 represents a stud shaft mounted horizontally in suitable bearings at the rear of the machine frame, and carrying tight and loose pulleys 7, and a pinion 8 of small diameter. This pinion is arranged between tworelatively large gear-wheels 9 and 10, with which it meshes, and which are driven by said gear. The gear 9 is fixed on one end of a shaft 11 horizontally mounted in journals 12 on the upper part of the frame 5, and the gear 10 is similarly secured on one end of a shaft 13 horizontally mounted in journals formed in the bed 14 of the machine. On the other end of the shaft 11 is fixed a bevel pinion 15 which meshes with and drives a beveldisk gear 16 which is horizontally arranged on the upper part of a vertical shaft 17. This shaft has a longitudinal slot 19 extending therethrough, and the disk-gear 16 is connected with the shaft 17 by a pin 18 which passes through the hub 16 of the gear, and through the slot 19 of the shaft with which it has sliding engagement. The hub 16 is seated and journaled in the upper part of the cylindrical extension 21 at the end of the overhanging arm 5 of the frame, which is suitably recessed to receive said hub. From the gear 16, the shaft 17 extends downwardly through a sleeve 20 which is externally threaded to engage the female threads in the extension 21. The lower end of this sleeve terminates in a hexagonal head 20 by which the sleeve may be readily turned when vertical adjustment of the sleeve in the extension 20 is desired. The lower end of the shaft 17 is flanged as at 17*, and is axially threaded to receive a screw 22 by which the horizontally arranged circular cutter 22 is secured to the shaft. The upper portion of the shaft 17 is turned down to form a stem extension 241, a portion of which is threaded to receive a washer or disk 26 and a nut 27. An expansion coiled spring 25 surrounds the shaft-stem 24, with the upper end of the spring bearing against the washer 26 and the lower end against the central portion of the gear 16. The parts just described are inclosed and protected by a dome-shaped cap or cover which is suitably secured to the upper face of the gear 16. On the front end of the horizontal shaft 14, a circular cutter 23 is vertically positioned and is secured in the manner described in connection with the cutter 22. As the latter cutter is horizontally positioned the two cutters stand at right angles to each other and their cutting edges are approximated to permit the passage therebetween of the sheet of metal indicated by the line 29. The co-acting cutting edges of the cutters permit the manipulation of the metal sheet so that the lines of severance may be straight or curved as may be desired, and the frictional contact between the revolving cutters and the sheet of metal is sufficient to automatically feed the sheet toward the cutters. As the plane of the cutting edge of the cutter 23 is above the level of the bed 14, the portion of the severed sheet over the bed is deflected by gravity from the portion resting upon said cutter thus facilitating the severance of the material in a manner well known.

The only differences in form between the machine shown in Fig. 1, and described in detail, and that shown in Fig. 2, are that the arm 5" is inclined upwardly toward its free end and the extension 21 is inclined inwardly from the perpendicular so that the cutter 22 stands at an obtuse instead of a right angle to the cutter 23*. This cutter 25 is formed with a beveled periphery, which facilitates the sharpening of the cutting edges. The bevel gear 16 is of smaller diameter than the corresponding gear 16 of Fig. 1 machine which is of course a mere matter of speed gearing, and its hub is extended to furnish a longer bearing for the shaft 17.

Having thus described my invention what I claim is 1. In a sheet metal cutting machine, a main frame comprising a bed and an overhanging arm, a vertically arranged cutter rotatably mounted in said frame with its cutting edge above the frame bed, a shaft rotatably and yieldingly mounted in said arm, a cutter secured to said shaft and arranged at an angle to the vertical cutter.

2. In a sheet-metal cutting machine, in combination with a main frame comprising a bed and an overhanging arm, a rotatable cutter mounted in a vertical plane on said frame, a rotatable cutter arranged in a horizontal plane on said arm, a yieldingly mounted shaft carrying said horizontal cutter, means for adjusting said shaft longitudinally, and means for driving said shaft and said vertical cutter.

3. In a sheet-metal cutting machine, in combination with a main frame comprising a bed and an overhanging arm, a vertically arranged cutter rotatably mounted below the bed of said frame, a horizontally arranged cutter rotatably mounted in said arm with its cutting edge in proximity to the cutting edge of the vertical cutter, a yielding shaft carryin said horizontal cutter, means for adjusting the position of the horizontal cutter relative to the vertical cutter and means for driving said vertical cutter and the shaft of the horizontal cutter.

In testimony whereof I affix my signature in the presence of two witnesses.

DAVID LENNOX.

WVitnesses:

G. W. LAWRENCE, A. H. E. MATTHEWS. 

